ERROR: not connected to the gnome-3-28-1804 content interface

[user@discord ~]$ whatsapp-for-linux
ERROR: not connected to the gnome-3-28-1804 content interface.
[user@discord ~]$ 

Can someone help? It stopped working suddenly, i think it stopped because my virtual volume was getting full and things stopped working. I enlarged the volume but the problem stays.

What is snap version and snap connections whatsapp-for-linux as well as snap list?

[user@discord ~]$ snap version
snap    2.43.3-1.fc30
snapd   2.43.3-1.fc30
series  16
fedora  30
kernel  5.4.88-1.qubes.x86_64
[user@discord ~]$ snap connections whatsapp-for-linux
Interface                Plug                                        Slot                         Notes
audio-playback           whatsapp-for-linux:audio-playback           :audio-playback              -
audio-record             whatsapp-for-linux:audio-record             -                            -
browser-support          whatsapp-for-linux:browser-support          :browser-support             -
camera                   whatsapp-for-linux:camera                   -                            -
content                  whatsapp-for-linux:gnome-3-28-1804          -                            -
content                  whatsapp-for-linux:gtk-3-themes             -                            -
content                  whatsapp-for-linux:icon-themes              -                            -
content                  whatsapp-for-linux:sound-themes             -                            -
dbus                     -                                           whatsapp-for-linux:dbus-app  -
desktop                  whatsapp-for-linux:desktop                  :desktop                     -
desktop-legacy           whatsapp-for-linux:desktop-legacy           :desktop-legacy              -
gsettings                whatsapp-for-linux:gsettings                :gsettings                   -
home                     whatsapp-for-linux:home                     :home                        -
network                  whatsapp-for-linux:network                  :network                     -
network-manager          whatsapp-for-linux:network-manager          -                            -
network-manager-observe  whatsapp-for-linux:network-manager-observe  -                            -
opengl                   whatsapp-for-linux:opengl                   :opengl                      -
removable-media          whatsapp-for-linux:removable-media          -                            -
screen-inhibit-control   whatsapp-for-linux:screen-inhibit-control   :screen-inhibit-control      -
upower-observe           whatsapp-for-linux:upower-observe           :upower-observe              -
wayland                  whatsapp-for-linux:wayland                  :wayland                     -
x11                      whatsapp-for-linux:x11                      :x11                         -
[user@discord ~]$ snap list
Name                Version                     Rev    Tracking  Publisher     Notes
core                16-2.49                     10859  stable    canonical✓    core
core18              20210128                    1988   stable    canonical✓    base
discord             0.0.13                      121    stable    snapcrafters  -
gnome-3-28-1804     3.28.0-19-g98f9e67.98f9e67  145    stable    canonical✓    -
gtk-common-themes   0.1-50-gf7627e4             1514   stable    canonical✓    -
snapd               2.49                        11107  stable    canonical✓    snapd
whatsapp-for-linux  1.1.5                       22     stable    nshecan       -
wickrme             5.73.13                     477    stable    tleavy        -
zoom-client         5.5.4-7938.0228             136    stable    ogra          -
[user@discord ~]$ 

Your snapd version is rather old, you should consider upgrading, but additionally, you need to connect the plugs from the whatsapp-for-linux snap to the gnome-3-28-1804 snap and then you should be working again:

snap connect whatsapp-for-linux:gnome-3-28-1804 gnome-3-28-1804:gnome-3-28-1804
snap connect whatsapp-for-linux:gtk-3-themes gtk-common-themes:gtk-3-themes
snap connect whatsapp-for-linux:icon-themes gtk-common-themes:icon-themes
snap connect whatsapp-for-linux:sound-themes gtk-common-themes:sound-themes

it’s unclear to me how those things got disconnected though, can you also share the output of

snap changes

How to upgrade sanpd?

Where can I read about the concept of “plugs” and “connections”?